Backup classification of disaster-tolerant backup

In-city backup refers to backing up the data of the production center in the local disaster recovery backup room, which is characterized by relatively fast speed. Because it is local, it is recommended to take over at the same time. But its disadvantage is that in the event of a major disaster, it will not be possible to ensure that the data and systems in the local disaster recovery backup computer room are still available.

Remote backup, through the Internet TCP/IP protocol, the data of the production center is backed up to a different place. Pay attention to the "13" and "three noes" when backing up, and you must back up to 300 kilometers away, and not in the same earthquake zone, the same power grid or the same river basin. In this way, even if a major disaster occurs, the data can be rolled back in different places. Of course, remote backup, if you want to take over, needs a dedicated line connection, and generally needs to take over the business of the same network segment.

Of course, it is best to establish a model of "two places and three centers", both in the same city and in different places, so that the security of data will be much higher.